85837813 has 4 divisors (see below), whose sum is σ = 85912288. Its totient is φ = 85763340.

The previous prime is 85837799. The next prime is 85837823. The reversal of 85837813 is 31873858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31873858 = 2 ⋅15936929.

It is a cyclic number.

It is not a de Polignac number, because 85837813 - 2¹³ = 85829621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85837813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85837823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35481 + ... + 37822.

It is an arithmetic number, because the mean of its divisors is an integer number (21478072).

Almost surely, 2^85837813 is an apocalyptic number.

It is an amenable number.

85837813 is a deficient number, since it is larger than the sum of its proper divisors (74475).

85837813 is a wasteful number, since it uses less digits than its factorization.

85837813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74474.

The product of its digits is 161280, while the sum is 43.

The square root of 85837813 is about 9264.8698317893. The cubic root of 85837813 is about 441.1228432485.

The spelling of 85837813 in words is "eighty-five million, eight hundred thirty-seven thousand, eight hundred thirteen".